#17378: Preparser gets lost with iterated ellipsis_range
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Reporter: tmonteil | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.5
Component: user interface | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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Here is a bug reported during a workshop at Villetaneuse today:
{{{
sage: [1..10]
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
sage: len([1..10])
10
sage: [1..len([1..10])]
[1, 2, 3]
}}}
After a quick look, it seems that there is a preparsing problem,
`[1..len([1..10])]` should be preparsed as something like:
{{{
(ellipsis_range(Integer(1),Ellipsis,len(ellipsis_range(Integer(1),Ellipsis,Integer(10)))))
}}}
but it is currently preparsed as:
{{{
sage: preparse('[1..len([1..10])]')
'(ellipsis_range(Integer(1),Ellipsis,len([Integer(1),Ellipsis,Integer(10)])))'
}}}
(the second `ellipsis_range` disappeared).
--
Ticket URL: <http://trac.sagemath.org/ticket/17378>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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